1123520733018 has 24 divisors (see below), whose sum is σ = 2518236126900. Its totient is φ = 361592879424.

The previous prime is 1123520733017. The next prime is 1123520733037. The reversal of 1123520733018 is 8103370253211.

It is a happy number.

1123520733018 is a `hidden beast` number, since 1 + 1 + 23 + 520 + 73 + 30 + 18 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1055072045889 + 68448687129 = 1027167^2 + 261627^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123520733017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1076168763 + ... + 1076169806.

Almost surely, 2^{1123520733018} is an apocalyptic number.

1123520733018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1123520733018 is an abundant number, since it is smaller than the sum of its proper divisors (1394715393882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123520733018 is a wasteful number, since it uses less digits than its factorization.

1123520733018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152338606 (or 2152338603 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 1123520733018 its reverse (8103370253211), we get a palindrome (9226890986229).

The spelling of 1123520733018 in words is "one trillion, one hundred twenty-three billion, five hundred twenty million, seven hundred thirty-three thousand, eighteen".